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Revert "serial: imx: Update mctrl old_status on RTSD interrupt"

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This reverts commit e1e87568a2 which is
commit 40d7903386df4d18f04d90510ba90eedee260085 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I37284d886dabab9e9b153c7aba3eaa8e14b3523f
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2024-11-16 14:06:29 +00:00
parent ca7ef58ce4
commit d82cacc625
1 changed files with 0 additions and 15 deletions
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15
drivers/tty/serial/imx.c
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@@ -801,21 +801,6 @@ static irqreturn_t __imx_uart_rtsint(int irq, void *dev_id)
imx_uart_writel(sport, USR1_RTSD, USR1);
usr1 = imx_uart_readl(sport, USR1) & USR1_RTSS;
/*
* Update sport->old_status here, so any follow-up calls to
* imx_uart_mctrl_check() will be able to recognize that RTS
* state changed since last imx_uart_mctrl_check() call.
*
* In case RTS has been detected as asserted here and later on
* deasserted by the time imx_uart_mctrl_check() was called,
* imx_uart_mctrl_check() can detect the RTS state change and
* trigger uart_handle_cts_change() to unblock the port for
* further TX transfers.
*/
if (usr1 & USR1_RTSS)
sport->old_status |= TIOCM_CTS;
else
sport->old_status &= ~TIOCM_CTS;
uart_handle_cts_change(&sport->port, usr1);
wake_up_interruptible(&sport->port.state->port.delta_msr_wait);